Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quais são os anos de participação para Pickerington North?
 ###Tabelas: CREATE TABLE by_school (by_school_id AUTO_INCREMENT PRIMARY KEY, School VARCHAR, Years of Participation VARCHAR, OCC Championships INT, Last OCC Championship VARCHAR, Last Outright OCC Championship VARCHAR) CREATE TABLE indian_telly_awards (indian_telly_awards_id AUTO_INCREMENT PRIMARY KEY, Year INT, Category VARCHAR, Character VARCHAR, For The Show VARCHAR, Result VARCHAR) CREATE TABLE conference_tournament_championships (conference_tournament_championships_id AUTO_INCREMENT PRIMARY KEY, Tournament INT, Conference VARCHAR, Championship Game Opponent VARCHAR, Score VARCHAR, Location VARCHAR, Head Coach VARCHAR) CREATE TABLE uk_ratings (uk_ratings_id AUTO_INCREMENT PRIMARY KEY, Episode number INT, Title VARCHAR, Original airing on Channel 4 VARCHAR, Time of airing on Channel 4 VARCHAR, Total viewers and Rank on C4 VARCHAR, Total viewers VARCHAR) CREATE TABLE moves_played_compared_with_computer_choices (moves_played_compared_with_computer_choices_id AUTO_INCREMENT PRIMARY KEY, Position INT, best year VARCHAR, best 2-year period VARCHAR, best 3-year period VARCHAR, best 5-year period VARCHAR, best 10-year period VARCHAR, best 15-year period VARCHAR)  
SELECT Years of Participation FROM by_school WHERE School = Pickerington North